Electromagnetic waves with frequencies approaching those of a plasma with a similar election plasma frequency, are highly reflected/absorbed by the plasma and can be predicted by a dispersion relation which is a function of electron density.
Let's say an electromagnetic wave is incident upon a metal vapor with a density similar to that of the electron density where high reflection/absorption takes place. Is there a similar phenomenon? Is there more reflection because each atom contains many electrons? If so, are there any papers which lay out a dispersion relation?
This question assumes there is no background magnetic field.
Thank you.
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